The outer fabric of our limited edition backpack is a durable waxed cotton. The cotton is grown in the USA and certified by BCI (Better Cotton Initiative), it is then sent to a mill in Pakistan whom our supplier has been working with over the last 10 years and visited several times during this time.
The wax waterproof's the cotton, so in order to keep it's waterproofing will need to be periodically re-waxed.